System status

Current and upcoming events

Past events

2016-11-29:

C3SE Seminar: Linux for Beginners 13:15 - 15:00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is an introductory Linux seminar, we will cover the basics of using Linux, for people new to Linux. The slides are available here.

C3SE Introduction Seminar: 13:15 - 15:00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. The slides from the seminar can be found here.

2016-10-19:

C3SE System stop: C3SE needs to perform a 3 day maintenance stop of the center storage system to apply enhancements and stability fixes.

C3SE Introduction Seminar: 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. The slides from the seminar can be found here. The next seminar will be given on November 18.

2016-10-06:

Parallel Computing in MATLAB and Scaling to SNIC HPC Clusters: 10:00 - 12.00, in room Raven & Fox, on the Chalmers Johanneberg Campus at the department of Physics Forskarhus floor 5. This hands-on workshop provided the attendees a walkthrough of parallel computing with MATLAB, using the Parallel Computing Toolbox (PCT). UPDATE: The slides from the seminar can be found here and here.

2016-09-15:

C3SE Introduction Seminar: 10:00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. The slides from the seminar can be found here. The next seminar will be given on October 13.

Inauguration of Hebbe: The new system will be inaugurated with a scientific workshop presenting examples of research that will be performed on Hebbe. In addition to oral presentations, there will be a poster session. More information and link to registration page can be found here.

2016-05-18:

C3SE Introduction Seminar: 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please register here.

2016-04-13:

C3SE Introduction Seminar, 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please register here. UPDATE: The slides from the seminar can be found here. The next seminar will be given on May 18.

2016-04-12:

Hebbe remote graphics offline: We have taken the Hebbe ThinLinc node offline to investigate issues that cause a dramatic slowdown. We will take it back online as soon as possible.

2016-03-01:

C3SE status page down: The C3SE health status page on www1 will be unavailable for some time today due to a server migration. UPDATE: The server migration has been completed and the status page should be available again. It will take some time for data from all systems to be reported again.

2016-02-18:

Slides from Allinea seminar: The slides from the Allinea seminar on January 28 are available here

2016-02-09:

C3SE Introduction Seminar, 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please [[Introductory Seminar RegistThe slides from the seminar can be found here.ration Form| register here]]. UPDATE:

2016-01-28:

Learn to use Allinea’s highly scalable and easy-to-use HPC development tools: Allinea, the makers of the Forge parallel debugger, will visit C3SE for a half-day workshop on January 28, 2016. This is a rare chance to meet an Allinea expert and learn to debug large parallel applications on C3SE clusters. For more information and registration, see the workshop page.

2015-11-26:

C3SE Introduction Seminar, 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. The slides from the seminar can be found here.

2015-10-15:

C3SE Introduction Seminar, 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please register here. UPDATE: The slides are available here

2015-09-30:

Matlab course in Lund: The SNIC site Lunarc in Lund will host a course in using parallel Matlab on SNIC resources. Please see the SNICDocs site for details. In connection with the course, it is possible to reserve a one hour coaching session with parallel computing expert Raymond Norris, from The MathWorks. Please contact Lunarc support for more information about the coaching sessions

2015-09-17:

C3SE Introduction Seminar, 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please register here.

2015-08-27:

Hebbe remote graphics: We have installed the ThinLinc remote desktop service on the Hebbe cluster. You can now login to our login node hebbe and get a graphical session on a ThinLinc server. Please note that 1) you will share the server with others, just like with the login node, and 2) we have a license permitting 10 concurrent users. Don't leave your session running when you're not using it! There is a maximum session duration of 1 day. Information on how to connect can be found here: ThinLinc on Hebbe. Report any issues to C3SE support.

2015-08-27:

Glenn remote graphics: We have upgraded our ThinLinc remote desktop service. You can now login to our login node glenn and get a graphical session on one of two ThinLinc servers. Please note that 1) you will share the server with others, just like with the login node, and 2) we have a license permitting 10 concurrent users. Don't leave your session running when you're not using it! Information on how to connect can be found here: ThinLinc on Glenn. Report any issues to C3SE support.

2015-08-21:

Hebbe pilot system: The Hebbe pilot system is available again for pilot users.

2015-08-07:

Center storage issues: We've had performance issues with the center storage system during most of the week, and are still experiencing issues. You may experience hangs, slow performance and crashes on the /c3se file system. We're working with the vendor to resolve these issues, but we don't expect it to be resolved before the weekend, unfortunately.

2015-08-05:

Center storage issues: We are still experiencing issues with the center storage system, and so you may experience hangs, slow performance and crashes on the /c3se file system. We're working with the vendor to resolve these issues.

2015-08-04:

Center storage issues: We are currently experiencing issues with the center storage system. This may lead to hangs and slow performance on the /c3se file system on all clusters.

2015-07-06:

Beda & Glenn: Due to a cooling issue in the morning, all compute nodes on Beda and Glenn had to be shut down. The cooling issue is now under control and we will be working to restore operations during the day.

2015-06-13:

Network maintenance at Chalmers: The Chalmers IT office will upgrade central network equipment on June 13-14. This will cause interruptions and disturbances for many Chalmers IT services, including license servers and the login authentication system. Most jobs should run unaffected over the weekend, but there may be problems logging in to our systems, and software using the Chalmers license servers may fail to check out licenses. More information will be on http://www.chalmers.se/insidan/SV/arbetsredskap/it/aktuellt-och-driftinfo/driftinformation

2015-04-21:

SweStore issues: All the SweStore storage pools are currently full, which means it's impossible to upload more data into SweStore. The SweStore administrators are working to add more disk to the system. Please send SweStore questions and support requests to support@swestore.se.

2015-05-20:

C3SE Introduction Seminar, 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. The slides are available here.

2015-05-06:

System stop completed: The system stop is now completed. Glenn and Beda are back in normal operation.

2015-04-30:

System stop: Between April 30 and May 6 we will have a full system stop on Glenn and the Hebbe pilot system, and a partial system stop on Beda. During this time, we will install a replacement and expansion for our centre storage system, and copy data from the old system. This requires us to unmount /c3se from the systems, making home-directories, $HOME, $SNIC_BACKUP and $SNIC_NOBACKUP unavailable. Glenn and the Hebbe pilot will be unavailable for login and no jobs will run during the stop. Beda will be available for login, the home directory will be available and jobs that do not access anything under /c3se (note that some applications are installed under /c3se) will be able to run. Do not hesitate to contact C3SE support if you have any questions or need assistance. Please remove files you no longer need, and either remove or archive directories with many small files, in order to help us speed up the move.

2015-04-29:

C3SE seminar: Debugging software at C3SE. 10.00 - 11.45 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. An introduction to some of the powerful debugging tools available on our resources. UPDATE: Slides are available here.

2015-04-14:

C3SE seminar: Software development at C3SE. 13.15 - 15.00 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. A tour of the different software development tools on our resources. UPDATE: The slides are available here.

2015-04-01:

C3SE seminar: Understanding the queue and scheduler. 10.00 - 11.45 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Learn how the scheduler works to balance the workload, how to use it, and how to troubleshoot your jobs. Please register here. UPDATE: The slides are available here

2015-03-25:

C3SE Introduction Seminar, 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is for all new users, to get a comprehensive overview of our systems and get started with using them. Please register here. UPDATE: The slides are available here.

2015-03-12:

C3SE seminar: the C3SE environment, 13.15 - 15.00 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is the first of several technical C3SE seminars planned for the spring. The subject is the C3SE environment - how storage, networks, software etc all fits together, and how to use the cluster effectively. Please register here. UPDATE: The slides are available here.

2015-02-24:

Linux for Beginners, 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is a very basic Linux introduction for people new to Linux. Please register here. UPDATE: The slides are available here.

2015-02-10:

C3SE Introduction Lunch Seminar, 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. NOTE: We've changed the introductory seminars from short lunch seminars, in order to be able to go slightly deeper into the material. Please register here. UPDATE: The slides are available here.

SNIC User Forum 2014,15-16 December 2014 (lunch-to-lunch) Konsert & Kongress in room Musikalen, Linköping. SNIC and the six high performance computing (HPC) centres in Sweden continually strive to adapt and improve the existing Swedish HPC infrastructure to meet the needs and wishes of our users. In this process, there is nothing more important than input and feedback from our users. If you have access to SNIC resources, use resources at any of the SNIC centres (NSC, PDC, HPC2N, UPPMAX, C3SE and Lunarc) or work at any of the SNIC HPC centres, SNIC cordially invites you to join us at the SNIC User Forum 2014 meeting and help form the future national infrastructure for large-scale computing and storage. More information and registration is available here event information

2014-12-11:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems.

2014-12-03:

OpenMP course in Lund, December 3-5. SNIC center Lunarc offers a course in shared memory parallel programming using OpenMP. All SNIC users are welcome. See the course page for more information and registration.

2014-11-13:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Slides are here. If you missed this, the next seminar will be on December 11.

2014-10-31:

Glenn unscheduled system service:UPDATE: The hardware service stop is completed. Due to hardware problems, we will perform a short stop on the management server for the Glenn cluster at around 14:40 today. We expect this to have little impact on users, but you may experience problems in logging in to Glenn. The interruption should be less than 15 minutes."

2014-10-29:

CANCELLED: C3SE HPC Course - beyond the basics. Due to low interest, the course has been cancelled. On 2014-10-29, between 09:00 - 16:00, approximately, C3SE will give a one-day course in HPC, going beyond the basics covered in the introductory seminars. See the course page for more information. Note: Registration required.

2014-10-29:

MPI course in Lund, October 29 - 31. SNIC center Lunarc offers a beginner's level course in parallel programming using Message Passing with MPI. All SNIC users are welcome. See the course page for more information.

2014-10-25:

MPI course in Stockholm, October 25 - 27. SNIC center PDC offers a beginner's level course in parallel programming using Message Passing with MPI. All SNIC users are welcome. See the course page for more information.

2014-10-16:

C3SE Seminar, "Understanding the queue and scheduler." Job queues and scheduling is central for any shared compute resource. Learn how the scheduler works to balance the workload, how to use it, and how to troubleshoot your jobs. 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. See here. UPDATE: Slides are here.

2014-10-09:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems.

2014-09-26:

Login nodes rebooted: due to security updates, the login nodes for both Beda and Glenn were rebooted this morning.

2014-09-25:

UPDATE: Still space left on this! Allinea/DDT Course at PDC: PDC arranges a one-day course introducing the parallel debugger Allinea/DDT (which we also have installed at C3SE). See here for more information.

C3SE seminar: the C3SE environment, 10.00 - 11.45 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. This is the first of several technical C3SE seminars planned for the autumn. The subject is the C3SE environment - storage, networks, software etc, and how it's all put together.

2014-09-11:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. The next introductory seminar will be on October 9.

2014-08-25:

UPDATE 2: Beda status: Beda login node is available again, with limited amount of memory, and the server will need some more maintenance later this week.

2014-08-25:

UPDATE: Beda status: Currently the Beda login node is unavailable due to hardware problems. Troubleshooting is ongoing.

2014-08-25:

Power failure on Glenn: We had a power failure on Glenn during Sunday evening. All running jobs were lost. (They've been requeued, but unless they were saving intermediate data, results was also lost.)

2014-08-19:

Login problems: Due to problems with Chalmers central servers, there are currently problems logging in to Beda and Glenn. See the ITS status page for more info.

2014-08-11:

New update on file system issues: We have just reopened Glenn for login. The file system is finally back up and both Beda and Glenn should be working normally. (Note that there are a number of down nodes since the power outage last week.) Please contact C3SE support if you see strange behaviour on the system, especially regarding files. We are sorry for the trouble this unplanned stop may have caused. PREVIOUS: Current status is as yesterday, i.e. the storage system still isn't fully functional. Parts of /c3se are still unavailable on both Beda and Glenn. We have blocked Glenn for logins, at the moment. We believe there's a good chance the system will be back online later today.

2014-08-10:

Sunday update on file system issues: The storage system isn't fully functional, unfortunately. Parts of /c3se are unavailable on both Beda and Glenn.

2014-08-09:

Saturday update on file system issues: The system should be up and running, but there are issues left, and it will take some time for everything to settle down. There may be strange behaviours.

2014-08-08:

Evening update on file system issues: Unfortunately no change. The center storage system is still down. We have been working together with the vendor, but the system is not yet running. This means Glenn is still unavailable for login, and jobs on Beda can't use directories (storage -- $SNIC_BACKUP and $SNIC_NOBACKUP -- and applications) under /c3se.

2014-08-07:

File system issues: The center storage system is currently unavailable. We are working to restore it. This means files under /c3se, including the Glenn home directories, are unavailable, and thus, it's not possible to login to Glenn at all. Unfortunately, all running jobs on Glenn are probably lost, since they lost the file system.

2014-08-07:

Update on power failure: The situation is more or less like yesterday. We are making slow progress with the storage issues, together with the vendor. We can't offer a prognosis for when this will be solved -- it's a technical problem, not a specific amount of work, and it will be solved when we identify the root cause of the problem.

2014-08-06:

Update on power failure: As yesterday, Beda is (mostly) up and running, with some nodes still offline due to memory errors etc, but Glenn is still having storage issues. We are working with the storage system vendor to solve this. Around 160 nodes are currently up on Glenn.

2014-08-05:

Update on power failure: Beda is up and running, but Glenn is still partly down. This is due to storage issues, specifically a large number of nodes that cannot access /c3se, where the home directories are mounted. We are working on this.

2014-08-04:

Update: Most of Beda is up and running, and parts of Glenn. We are still working on network and storage issues. Please contact C3SE support if the system misbehaves. PREVIOUS: Power failure: Due to thunderstorms on Sunday afternoon and evening, most of both Glenn and Beda lost power. We are working to bring the systems back up.

2014-07-31:

Power problem: We had a power problem with rack 6 of Glenn tonight. glenn[57-71]-[1-4] lost power, and so jobs running on those nodes may have failed. Some jobs may have been restarted, of course. The nodes are up and running again, and we've taken steps to prevent the same problem happening again.

2014-06-11:

Service stop completed. We have finished moving to the new storage system and upgraded Slurm. Both Beda and Glenn are now back to normal operation.

2014-06-09:

C3SE Centre Storage move and full stop on Glenn. On Monday, June 9, we will begin switching center storage systems. This impacts the Glenn home directories, and we will therefore do a full system stop on Glenn. From 08:00 on June 9, no jobs will run on Glenn. We will also upgrade the Slurm queuing system, which will require us to empty the job queue completely. Jobs that finish before 08:00 June 9 can be run up to the deadline, but all pending jobs will be deleted at that time. Beda will still be available, but the SNIC_BACKUP / SNIC_NOBACKUP directories (under /c3se) will not be available until the new center storage system is up. We will gradually re-enable users to run on Glenn and use /c3se directories as we bring the new storage system up with migrated user data.

2014-06-09:

C3SE Centre Storage move and full stop on Glenn. On Monday, June 9, we will begin switching center storage systems. This impacts the Glenn home directories, and we will therefore do a full system stop on Glenn. From 08:00 on June 9, no jobs will run on Glenn. We will also upgrade the Slurm queuing system, which will require us to empty the job queue completely. Jobs that finish before 08:00 June 9 can be run up to the deadline, but all pending jobs will be deleted at that time. Beda will still be available, but the SNIC_BACKUP / SNIC_NOBACKUP directories (under /c3se) will not be available until the new center storage system is up. We will gradually re-enable users to run on Glenn and use /c3se directories as we bring the new storage system up with migrated user data.

2014-06-10:

CANCELLED: C3SE HPC Course - beyond the basics. Due to low interest, the course has been cancelled. It will likely be rescheduled in the fall. On 2014-06-10, between 09:00 - 16:00, approximately, C3SE will give a one-day course in HPC, going beyond the basics covered in the introductory seminars. See the course page for more information. Note: Registration required, registration closes on 2014-06-02.

2014-05-05:

C3SE Graduate Course in Python and High Performance Computing 2014 C3SE will give a graduate course in Python and HPC between 2014-05-05 and 2014-06-04. See the course page for more information. Note: registration closes on 2014-04-18. A poster is available, if you'd like to print.

2014-06-05:

C3SE Seminar, "Speeding up MATLAB Computations using SNIC Clusters" 09.00 - 12.00. MathWorks and C3SE will show how you can get access to the resources already available to you, and speed up your computations in MATLAB on your computer and on large clusters. In lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. See here. UPDATE: The slides are available here: Speeding_up_MATLAB.pptxSpeeding_up_MATLAB.zipPCT_and_MDCS.pptxPCT_and_MDCS.zip

2014-05-21:

C3SE Seminar, "Using Bash for scripting and interactive work." 13.15 - 15.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. See here. UPDATE: The slides are available here

2014-05-08:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2014-04-10:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2014-04-09:

C3SE Seminar, "Understanding the queue and scheduler." 10.00 - 11.45, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. See hereUPDATE: the slides are available here.

2014-03-12:

C3SE seminar: the C3SE environment, 13.15 - 15.00 in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics.. This is the first of three C3SE seminars planned for the spring. The subject is the C3SE environment - storage, networks, software etc, and how it's all put together. Slides from the seminar are available here part1 and part2.

2014-03-09:

PRACE: International Summer School on HPC Challenges in Computational Sciences, 1-6 June 2014, Budapest. Graduate students and postdoctoral scholars from institutions in Europe, Canada, Japan and the United States are invited to apply for the fifth International Summer School on HPC Challenges in Computational Sciences, to be held from 1 to 6 June 2014 in Budapest, Hungary. Interested students should apply by March 9, 2014. Read more here.

2014-03-06:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2014-02-06:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2014-01-30:

E-science Seminar: PRACE for SNIC usersLilit Axner, PDC Center for High Performance Computing, KTH Royal Institute of TechnologyLilit is the SNIC centers coordinator within PRACE Infrastructure and a Researcher/Project manager at PDC. She will discuss the opportunities PRACE provides for access to higher level compute systems as well as the availability of advanced software support.

She writes: "In my presentation I will give a small introductory of PRACE Infrastructure, explain SNIC activities within PRACE. The main goal of the talk will be to explain the multiple possibilities PRACE opens for SNIC users to access Tier-1 and Tier-0 systems across Europe through its periodic application calls. Through these calls SNIC users geta) Additional compute timeb) Possibility to access the wide range of compute architecture that may not exist in Sweden.c) Additional help (up to 6 months) from PRACE application expertsI will give an introductory for call application processes both from applicants and PRACE staff perspectives and will try to answers the questions from the audience. I will also present some statistics for SNIC in the PRACE calls."

The EDIT-room (room 3364) is a seminar room on floor 3 in the EDIT building, near the Cafe and the "lens" – easiest access is from the stairs in the inner yard.

PRACE: Call for Proposals for Tier-1 access: DECI-12, closing date 20 January 2014: The Partnership for Advanced Computing in Europe (PRACE) invites European researchers to apply for access to powerful national (Tier-1) computing resources in Europe. Proposals from academia and industry are eligible, as long as the project leader is undertaking non-proprietary research. Project leaders will typically be employed in research organisations (academic or industrial). Proposals must deal with complex, demanding, innovative simulations that would not be possible without Tier-1 access. The PRACE DECI calls provide single project cross-national access to national HPC resources (Tier-1). Access will be awarded for a period of 12 months. Allocations are available on architectures such as Cray XE, Cray XC30, IBM Blue Gene/Q, Intel and PowerPC Clusters (various processor and memory configurations) and hybrid systems (clusters with GPGPU accelerators). Applicants need not specify a particular machine or architecture, but if they do, their preferences will be taken into account. Calls for proposals for Tier-1 access are issued twice a year.

SNIC training survey: NOTE: The closing date for the survey has been moved to December 20. To plan future training activities within The Swedish National Infrastructure for Computing (SNIC), we would like to understand the training needs of both the user communities and the staff at the SNIC centres. We therefore invite users and staff to participate in the training survey, which is accessible from: https://www.surveymonkey.com/s/snic_training_2013 The survey will be open until the 20th December 2013. Your time and input is much appreciated.

2013-12-10:

C3SE Klusterstuga: On Tuesdays 12:30-15:00 C3SE staff are available for consultation on HPC-related matters. We're in room O.5105B in the Origo building. Entry through Fysikgården 1 (see map), then up one floor and to the right.

2013-12-06:

Power supply issue: Due to bad weather and storm, we had a power failure on Glenn and Beda cluster. Systems will be available shortly.

2013-12-05:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Thanks everyone who attended the seminar! The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2013-11-21:

C3SE advanced support: We now offer advanced support, with things like workflow improvement, data management techniques, workflow automation via scripting, using software development, profiling and troubleshooting tools, etc. This is not aimed at coding help, but at more efficient use of HPC resources. If you'd like to discuss with us if there are ways to work more efficiently, don't hesitate to contact us at (please use a subject of "advanced support").

2013-11-13:

Glenn system stop: We will have a system stop on Glenn between 08:00 and 13:00, to update the queuing system. The system will be available for login and jobs can be queued, but no jobs will run during the stop. UPDATE: The update was completed successfully.

2013-10-31:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Thanks everyone who attended the seminar! The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2013-10-22:

GPU/Accelerator road show at Chalmers/Johanneberg : Complete agenda here SNIC will host a GPU/Accelerator seminar in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. The seminar will give an insight in GPU/Accelerator usage and development. The available GPU/Accelerator systems in SNIC will also be presented. Below you find the link where you can register to participate. Registration Doodle

2013-10-23:

Workshop on cluster computing with MATLAB at NSC/Linköping : Registration and information here Welcome to attend an afternoon seminar hosted jointly by MathWorks and NSC, Linköping University, where we present the new options for running MATLAB on the NSC clusters.

2013-09-30:

We have changed the calculation of project core-hour usage on Beda and Glenn. Previously, we calculated usage during the current month. We now calculate usage over the last 30 days. This is done to align with the other SNIC sites, and also to get better utilization of the system. The projinfo command has been update and reports the new numbers.

2013-09-26:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Thanks to all who attended the seminar! The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2013-09-23:

Parallel Programming Course at HLRS/Stuttgart :HLRS in Stuttgart will host a parallel programming course in September 2013. The three parts will focus on "Message Passing Interface (MPI) for beginners", "Shared memory parallelization with OpenMP (for beginners)" and "Advanced topics in parallel programming". See the course page for more information.

2013-07-13:

Update on storage problems: The file system checks are still running. No change in system status, i.e. Glenn is offline, Beda is online but $SNIC_BACKUP, $SNIC_NOBACKUP and all directories under /c3se, including most commercial software installations, are unavailable.

2013-07-12:

Noon update on storage problems: The file system checks are still running. They run in three stages, and stage 2 is nearly finished. We still hope to bring the systems back online by Monday.

2013-07-11:

Afternoon UPDATE on storage problems: Thanks for your patience this week. We fully appreciate how frustrating it is to have your files and work unavailable, and are doing our level best to bring everything back online. We will continue working during the weekend, but will update this page less frequently. Based on the progress of the file system checks, we believe the systems may be coming back online on Monday. Please note that this is not a promise. OLDER INFO: The file system checks are still running on the storage system. They are taking a long time, due to the size of the file system. We currently don't expect the system to be available this week. In other words: Glenn will not be available this week, and Beda will not have $SNIC_BACKUP, $SNIC_NOBACKUP and all application installations under /c3se (most commercial software) available. We're aware that many of you have deadlines of various kinds, and we're sorry for the problems caused by this. Still, the file system checks are necessary to make sure we don't suffer data corruption or data loss when we re-enable access to the system. Those of you using Beda, please note the news item below.

2013-07-11:

At 17:30 Chalmers ITSInfrastructure will upgrade a central router. This will cause a network downtime of 5-10 minutes. During the upgrade no C3SE resources will be reachable.

2013-07-10:

UPDATE on storage problems: At 17:00, the software update part is finally finished. We are now running file system checks to ensure there are no errors in the file system. This will take time. OLDER INFO: Unfortunately, we still aren't ready to bring the storage system and Glenn back online. Work is ongoing, but there's been some complications. We are sorry for the inconvenience, and we are working with the vendor to get the system back online. Glenn is offline and unavailable for login, Beda is online but $SNIC_BACKUP, $SNIC_NOBACKUP and all application installations under /c3se (most commercial software) are unavailable.

2013-07-09:

At 17:30, we're still working on the storage system. It will not be ready by tomorrow morning. Maintenance is still going on, with software updates being applied to the storage system. Glenn and the /c3se directories will not be available today, but we hope to get them up by tomorrow. We'll update as we know more. We are doing work on the storage system today, and Glenn is offline. You will not be able to log in to Glenn and no jobs are running. Beda is available for login, and jobs that do not use data from the /c3se directories will be able to run. $SNIC_BACKUP, $SNIC_NOBACKUP and all application installations under /c3se (most commercial software) are unavailable.

2013-07-08:

We are currently having problems with the centre storage system. UPDATE: The storage system is up and running, but there are errors in the file system. We will have to run error checks on the file systems, which will take some time. We are currently planning this work. We have stopped new jobs from running on Glenn while we work on the file system. You can still log in, but not run jobs. The problems are due to a disk controller failure. All files on the centre storage (under /c3se - i.e. home directories on Glenn, $SNIC_BACKUP, $SNIC_NOBACKUP, all application installations on Glenn and some on Beda) are affected. We are working to restore the system to normal operations. Typical symptoms are missing files, strange characters in file listings, and I/O errors. On Beda, home directories and many application installations are unaffected, but data under the /c3se directory may be affected.

2013-06-28:

We had some severe problems with the centre storage in the afternoon (mainly affecting Glenn, but to some extent also Beda).

2013-06-18:

Network rerouting: At 08:00 Chalmers ITS will reroute all of our incoming connections, you might get logged out and have a hard time reaching us for a moment. Should be ok again by 08:30.

2013-06-11:

Power failure: Due to a large power failure in Gothenburg, all our systems lost power. All running jobs were lost.

2013-05-28:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Thanks to all who attended the seminar! The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2013-05-27:

OpenMP course in NSC/Linköping. NSC hosts a three-day course (May 27 to May 29) in shared memory programming using OpenMP open to all PhD students, postdocs etc. affiliated with a Swedish research institute. The course will be given by SNIC parallel programming expert Joachim Hein. More information and registration here.

2013-05-22:

The earlier power problems are resolved.

2013-05-22:

Power problems: due to power problems yesterday evening, most of Glenn and parts of Beda and Svea currently lack electric power. We are working to restore power.

2013-05-20:

Chalmers remote servers unavailable. The ssh remote servers at Chalmers are currently unavailable. More information here. The alternative is to use VPN. See the Chalmers IT web pages.

2013-05-07:

C3SE Technical Lunch Seminar. On Tuesday May 7, 12.15 - 13.00, C3SE users are welcome to a technical seminar to discuss requirements for future HPC resources. How much memory, what type of CPUs, GPUs, etc? We will also introduce our new colleagues and introduce some new development tools at C3SE. The seminar will be in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. UPDATE: The slides from the presentation are available here

2013-04-23:

PRACE Spring School on New and Emerging Technologies - Programming for Accelerators, Umeå, Sweden, from Tuesday, April 23, at 09.00 to Friday April 26 at 16.00 (CET), 2013. More information and registration can be found here

2013-04-10:

Due to a problem with a power supply, we lost power to one rack of compute nodes on Glenn. Unfortunately, a number of jobs were lost.

2013-04-04:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. UPDATE: Thanks to all who attended the seminar! The slides are available here, the tutorial is here and the slides from earlier seminars are available on the page C3SE introduction and technical seminars. Those slides contain plenty of examples.

2013-02-26:

C3SE Introduction Lunch Seminar, 12.15 - 13.00, in lecture hall Pascal, on the Chalmers Johanneberg Campus at the department of Mathematics. Please note that attendance is mandatory for new users, in order to be allowed to start using our systems. We hand out 20 baguettes before the seminar, first-come first-serve.

2013-02-08:

Glenn is back in service, and the files and directories under /c3se should now be normally available from Beda and Svea.

2013-02-08:

UPDATE: The Glenn maintenance work is proceeding and we are currently testing the upgraded system. We expect to be back in production soon.

2013-02-08:

FULL SYSTEM STOP ON GLENN: System stop on the Glenn cluster due to maintenance and upgrade work on the center storage system. Starting at 8:30, Glenn will be unavailable and you will not be able to log in. On Beda and Svea, the /c3se directory will be unavailable, meaning that the $SNIC_BACKUP and $SNIC_NOBACKUP directories and all applications installed under /c3se will be unavailable. The maintenance work should be completed by lunchtime.

2013-01-11:

Beda is back up and running again.

2013-01-11:

Due to a power problem late last night approximately half of Beda is currently offline. We have stopped the scheduling of new jobs.

2013-01-02:

The issue with the centre wide filesystem is now resolved. This means that Glenn is accessible again and that it is possible to access $SNIC_BACKUP and $SNIC_NOBACKUP on Beda again.

Misc

Get support

If you have any problems with our systems or if you have suggestions or wishes, please send an e-mail to

We also offer advanced support, with things like workflow improvement, data management techniques, workflow automation via scripting, using software development, profiling and troubleshooting tools, etc. This is not aimed at coding help, but at more efficient use of HPC resources. If you'd like to discuss with us if there are ways to work more efficiently, don't hesitate to contact us at (please use a subject of "advanced support").

On Tuesdays 12:30-15:00 C3SE staff are available for consultation on HPC-related matters. We're in rooms O.5105B, O.5110 and O.5111 in the Origo building. Entry through Fysikgården 1 (see map), then up one floor and to the right.

Acknowledgement suggestion

If the results you get from using the resources at C3SE end up in a paper or are presented at a workshop or conference, C3SE kindly asks you to acknowledge C3SE.
Here is a suggestion on how such an acknowledgement could be formulated:

The computations/simulations/[OR SIMILAR] were performed on resources at Chalmers Centre for Computational Science and Engineering (C3SE) provided by the Swedish National Infrastructure for Computing (SNIC).

If applicable, also add:

NN at C3SE is acknowledged for assistance concerning technical and implementation aspects [OR SIMILAR] in making the code run on the [OR SIMILAR] C3SE resources.